CAD-CAM AND CNC TECHNOLOGY IMPLEMENTATION FOR A SUSTAINABLE REFURBISHMENT OF HISTORIC DISTRICTS. A CASE STUDY FOR BILBAO

misbe2011 Tracking Number 87

After having researched a construction system based on CAD-CAM and CNC, we come to the conclusion that this system is appropriate for implementing it in refurbishment processes in old buildings. More precisely, refurbishment in buildings erected before industrialization with wooden structure and masonry facades in dense and historic city quarters. The main goals of the construction system are the recyclability of all elements, energy savings, bioclimatic performance, economy, accuracy and safety in the building site and simple procedures to write the project documentation. The old quarters accessibility is often a handicap for implementing standardized components. In this case, the structural panels can be elevated to the floors with a reasonable physical effort for the worker, using the staircase, instead of an electric elevator. Moreover, the heterogeneous personal economical resources of the neighbours in the building, is often an added problem for executing overall refurbishment of buildings. This system allows to make partial refurbishments and can work in different phases. The new program layout planned for the buildings or apartments solved with the common refurbishment technologies and systems, requires an added slab of 20 cm for the drainage piping system. The application of the system can avoid this. The construction system is adaptable to any geometry. In this way, there is no problem to applying the system on non-orthogonal plots. Using a CAD-CAM coordinated system the structure is easily adaptable to irregular geometries and dimensions. During the first industrial era, in the historic city centre buildings, the insertion of plumbing system in a wooden structure building was rarely successful. The wooden structure near these plumbing facilities, is almost always rotten or damaged. The proposed construction system offers a solution for this problematic. Normally such historic buildings don't have a correct insulation. The system allows a bioclimatic performance of the whole building.